Complex number with PHP ?

[Anon]

Hello,

i need to add a function that return this formula :

return ((pow($e,2$i$y)-1)/((pow($e,2$i$y)+1)2$i));

where

$e = 2.7182818;
$i = sqrt(-1);
$y = parameter;

but as you see $i is a complex number !
How to avoid to have as result a "NaN" ?

Bye

Raffaello

[Anon]

it should work this way (haven't tried it):

return ((pow($e,2(sqrt(-1))$y)-1)/((pow($e,2(sqrt(-1))$y)+1)2$i));

cya Rob